Summary File 3 (SF 3) contains the sample data, which is the information compiled from the questions asked of a sample of all people and housing units. Population items include basic population totals; urban and rural; households and families; marital status; grandparents as caregivers; language and ability to speak English; ancestry; place of birth, citizenship status, and year of entry; migration; place of work; journey to work (commuting); school enrollment and educational attainment; veteran status; disability; employment status; industry, occupation, and class of worker; income; and poverty status. Housing items include basic housing totals; urban and rural; number of rooms; number of bedrooms; year moved into unit; household size and occupants per room; units in structure; year structure built; heating fuel; telephone service; plumbing and kitchen facilities; vehicles available; value of home; monthly rent; and shelter costs.

In Summary File 3, population tables are identified with a "P" and housing tables are identified with an "H" prefix, followed by a sequential number. The "P" and "H" tables are shown for the block group and higher levels of geography, while the "PCT" and "HCT" tables are shown for the census tract and higher levels of geography. There are 16 "P" tables, 15 "PCT" tables, and 20 "HCT" tables that bear an alphabetic suffix on the table number, indicating that they are repeated for nine major race and Hispanic or Latino groups.1

Summary File 3 contains a total of 813 unique tables-484 population tables and 329 housing tables. The chart below summarizes the geographic coverage available for the tables and the tables that are repeated by race and Hispanic or Latino.

Footnotes:

1These selected tables are repeated by the following: White alone; Black or African American alone; American Indian and Alaska Native alone; Asian alone; Native Hawaiian and Other Pacific Islander alone; Some other race alone; Two or more races; Hispanic or Latino; and White alone, not Hispanic or Latino.

Tables are shown

Population tables (484)

Housing tables (329)

To the block group and higher

P1 through P160

H1 through H121

By race and Hispanic or Latino, with alphabetic suffix A-I

P145 through P160 (e.g., P145A, P145B, P145C, ..., P145I, etc.)

None

To the census tract level and higher

PCT1 through PCT76

HCT1 through HCT48

By race and Hispanic or Latino, with alphabetic suffix A-I

PCT62 through PCT76 (e.g., PCT62A, PCT62B, PCT62C, ..., PCT62I, etc.)

HCT29 through HCT48 (e.g., HCT29A, HCT29B, HCT29C, ..., HCT29I, etc.)

SF 3 includes population and housing characteristics for the total population and for a limited list of race and Hispanic or Latino groups. Population and housing items may be cross tabulated. Selected aggregates and medians also are provided. A complete listing of subjects in this file is found in the section, "Subject Locator."

Summary File 3 (SF 3) is released as individual files for each of the 50 states, the District of Columbia, Puerto Rico, and the United States. The tables (matrices) are identical for all files, but the geographic coverage differs.
This abstract lists the most frequently accessed geographic levels. The "Summary Level Sequence Chart" section outlines the hierarchical and inventory geographic summaries in their entirety. Two summary level sequence charts are provided: one for the state files and one for the final national file.

SF 3 for states, the District of Columbia, and Puerto Rico provides data for these areas and their subareas in hierarchical sequence down to the block group level (census tract level for some matrices - PCT or HCT tables). The file structure includes, but is not limited to the following geographic entities:

State2
County3
County subdivision4
Place (or place part)
Census tract
Block group

State portion of American Indian and Alaska Native Area (with off-reservation trust lands and with no off-reservation trust lands) and Hawaiian home land County portion of American Indian and Alaska Native Area and Hawaiian home land.
SF 3 for states also has inventory (complete) summaries for the following geographic areas:

Place
Census tract
Block group
Congressional district (106th Congress)
Consolidated city
Metropolitan area
ZIP Code® tabulation area (ZCTA)

Footnotes:

2This includes states, the District of Columbia, or Puerto Rico.3Parish in Louisiana, borough or census area in Alaska, and municipio in Puerto Rico; in Maryland, Missouri, Nevada, and Virginia, one or more cities are independent of counties and are treated as statistical equivalents of counties; the entire District of Columbia, which has no counties, is treated as a county equivalent.4In Puerto Rico, some subdivisions (barrios-pueblos and barrios) are divided into subminor civil divisions (subbarrios).

The SF 3 national file provides summary data for the entire United States. The file structure includes, but is not limited to, the following geographic entities:

United States
Region
Division
State
County
County subdivision
Place

Metropolitan statistical area/Consolidated metropolitan statistical area (MSA/CMSA)
Consolidated metropolitan statistical area/Primary metropolitan statistical area (CMSA/PMSA)
Urban area
Congressional district (106th Congress)
American Indian and Alaska Native Area and Hawaiian home land
ZIP Code® tabulation area (ZCTA)

The section on User Updates informs data users about corrections, errata, and related explanatory information. These updates provide information about unique characteristics, changes, or corrections. However, sometimes this information becomes available too late to be reflected in the tables (matrices) or related documentation. Census 2000 user updates are available on the Census Bureau's Internet site at www.census.gov/main/www/cen2000.html. Users also can register to receive user updates by e-mail by contacting Customer Services Center, Marketing Services Office, U.S. Census Bureau on 301-763-INFO (webmaster@census.gov).

Files containing sample data on households and families; marital status; grandparents as caregivers; language and ability to speak English; place of birth, citizenship status, and year of entry; migration, place of work, etc., for 336 race, Hispanic or Latino groups, American Indian and Alaska Native tribe categories, and ancestries. The file for each state includes selected data down to the census tract level, while the national files include data only down to the place level or higher. These files will be made available on the Internet, on DVD, and on CD-ROM. Scheduled for release in 2002-2003.

A series of reports for the United States, each state, the District of Columbia, and Puerto Rico, which contains sample data for states, counties, county subdivisions, places, and state parts of American Indian and Alaska Native areas, and Hawaiian home lands. The United States summary report presents the same sample data for the United States; states, Puerto Rico, and the District of Columbia; metropolitan areas; urbanized areas; places of 100,000 or more population; American Indian and Alaska Native Areas; and Hawaiian home lands. This report will be made available on the Internet (PDF) and as a printed report. Scheduled for release in 2003.